The U.S. military relies heavily on drones overseas, but now the government is one step closer to using drone flights across the United States.

The Federal Aviation Administration requested that states submit proposals to create six drone test sites around the country.

"Our focus is on maintaining and improving the safety and efficiency of the world's largest aviation system," Transportation Secretary Ray LaHood said in a statement. "This research will give us valuable information about how best to ensure the safe introduction of this advanced technology into our nation's skies."

Possible users of the drones include police, power companies, and farmers.

Privacy advocates worry the use of drones will lead to a surveillance society where Americans are monitored by authorities.

"There is a legitimate concern about privacy," Medina County Sheriff Tom Miller told The Plain Dealer. "If I'm having a barbecue in my backyard, I don't want this thing flying over it. But I sure want it up in the air if my grandson is missing."

"The public has every right to know how these are going to be used by agencies that serve their communities," he said.